Stickboy Defender is an action-based game where players recruit stickman soldiers (stickmen) by dragging them onto a wall to merge identical units into stronger fighters. The main gameplay involves survival against waves of enemies with increasing difficulty levels, including enemy attacks and upgrades that increase damage output. The player can upgrade their sticks using the lucky wheel for bonuses such as increased speed or health points while collecting offline earnings from various sources like coins in stores (coins), virtual currency on websites (virtual currencies) etc.
The game offers a variety of units with different abilities to choose, including basic soldiers and advanced stickmen that offer unique combat strategies. The player can also customize their sticks by selecting colors for better camouflage or more effective attacks against enemies such as the "Sticky Stickman" which has an extra attack power when it collides.